81038071674 has 64 divisors (see below), whose sum is σ = 210597319680. Its totient is φ = 22615271280.

The previous prime is 81038071669. The next prime is 81038071679. The reversal of 81038071674 is 47617083018.

It is an interprime number because it is at equal distance from previous prime (81038071669) and next prime (81038071679).

It is a super-2 number, since 2×81038071674² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81038071679) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2476612 + ... + 2509119.

It is an arithmetic number, because the mean of its divisors is an integer number (3290583120).

Almost surely, 2^81038071674 is an apocalyptic number.

81038071674 is an abundant number, since it is smaller than the sum of its proper divisors (129559248006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81038071674 is a wasteful number, since it uses less digits than its factorization.

81038071674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4985792 (or 4985786 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 81038071674 in words is "eighty-one billion, thirty-eight million, seventy-one thousand, six hundred seventy-four".